#!/usr/bin/env ruby
# Encoding: utf-8
#
# Author:: api.sgomes@gmail.com (Sérgio Gomes)
#
# Copyright:: Copyright 2011, Google Inc. All Rights Reserved.
#
# License:: Licensed under the Apache License, Version 2.0 (the "License");
#           you may not use this file except in compliance with the License.
#           You may obtain a copy of the License at
#
#           http://www.apache.org/licenses/LICENSE-2.0
#
#           Unless required by applicable law or agreed to in writing, software
#           distributed under the License is distributed on an "AS IS" BASIS,
#           WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
#           implied.
#           See the License for the specific language governing permissions and
#           limitations under the License.
#
# This example illustrates how to retrieve all the ad groups for a campaign. To
# create an ad group, run add_ad_group.rb.
#
# Tags: AdGroupService.get

require 'adwords_api'

def get_all_ad_groups(campaign_id)
  # AdwordsApi::Api will read a config file from ENV['HOME']/adwords_api.yml
  # when called without parameters.
  adwords = AdwordsApi::Api.new

  # To enable logging of SOAP requests, set the log_level value to 'DEBUG' in
  # the configuration file or provide your own logger:
  # adwords.logger = Logger.new('adwords_xml.log')

  ad_group_srv = adwords.service(:AdGroupService, API_VERSION)

  # Get all the ad groups for this campaign.
  selector = {
    :fields => ['Id', 'Name'],
    :ordering => [{:field => 'Name', :sort_order => 'ASCENDING'}],
    :predicates => [{
      :field => 'CampaignId',
      :operator => 'IN',
      :values => [campaign_id]
    }]
  }
  response = ad_group_srv.get(selector)
  ad_groups = response[:entries]
  puts "Campaign ID %d has %d ad group(s)." % [campaign_id, ad_groups.length]
  ad_groups.each do |ad_group|
    puts "\tAd group name is '%s' and ID is %d" %
        [ad_group[:name], ad_group[:id]]
  end
end

if __FILE__ == $0
  API_VERSION = :v201209

  begin
    campaign_id = 'INSERT_CAMPAIGN_ID_HERE'.to_i
    get_all_ad_groups(campaign_id)

  # HTTP errors.
  rescue AdsCommon::Errors::HttpError => e
    puts "HTTP Error: %s" % e

  # API errors.
  rescue AdwordsApi::Errors::ApiException => e
    puts "Message: %s" % e.message
    puts 'Errors:'
    e.errors.each_with_index do |error, index|
      puts "\tError [%d]:" % (index + 1)
      error.each do |field, value|
        puts "\t\t%s: %s" % [field, value]
      end
    end
  end
end
